SUPERG,
The throttle body is a valve. Opening or closing it allows more, or less, air to flow into the engine. The throttle position sensor (TPS) tells the computer the position of the throttle plate (valve), that is how open or closed the throttle plate is.
The computer then increases, or decreases, the amount of fuel sprayed by the injectors to correspond with the throttle position.
Coolant does flow through the intake plenum just behind the throttle body. Darn, I cannot remember at the moment if the coolant flows arround the throttle body itself. The coolant can warm the incoming air, or cool the air, depending on the under-hood ambient temperature.
To remove the throttle body remove the cover (one screw), and the hose(snorkle)by loosening the clamp. Then rotate the throttle by hand to its wide open position. The throttle cable and cruise control cables can be removed by pulling back the cables and sliding them out the hole and slot for the cable.
Then simply remove the two bolts and two nuts and any other attachments. Before you do this I would recommend that you have a new gasket on hand. Do the reverse to put it back together.
Use a very minor amount of anti-sieze compound on the bolt threads, and torque the nuts and bolts to specification (which I cannot remember at the moment either). I recommend using anti-sieze compound on any fastener going into aluminum.
Do not get cleaning solvent in the TPS. Hope this helps, rangerj thumbs_u